Cutting-disk for seeding-machines



. T E N R A D W CUTTING DISK FOR SEBDING MACHINES.

Patnted Feb 22 1887.

UNITED STATES PATENT OFFICE WILLIAM D. ARNETT, OFDENVER, OOLOR-ADO.

CUTTlNG-DISK FOR SEEDlNG-MACHlNES.

SPECIFICATION foming part of Letters Patent No. 358,246, dated February 22, 1887.

Application filed April 10, lg. Serial No. 199.131. (No model.)

To all whom, it may concern:

Be it known that I, WILLIAM D. ARNETT, acitizen of the United States, residing at Denver, in the county of Arapahoe and State of Colorado, have invented a new and useful Improvement in Outting-Disks for Seeding-Machines, of whichthe following is a specification.

In Letters Patent of the United States No. 3l2,791, issned to me February 24, 1885, is illustrated a seeding-machine in which the ordinary hoes or drilling-teeth are replaced byvertical disks arranged obliquely to the line of travel, their lower edges entering the ground and opening the furrows for the reception of the seed. r

This iuvention relates to an improvement in the form of these furrow-opening disks, whereby they are adapted to scour and keep their surfaces free-from adhering earth, and also adapted to be operated with less power than heretofore; and the improvement consists, essentially, in forming their outer or operative faces with an abrupt or sudden depression at the center. v

As my improvemeuts may be used in connection with 'machines in other respects ot' ordinary Construction, I have deemed it sufficient to show herein my improved disk and the parts immediately connected therewith.

ln the accompanying drawings, Figure l represents a top plan View of a double drag-bar having two of my disks attached to its rear end. Fig. 2 is a central cross-section of my disk in its approved form. v Fg. 3 is a side or face View of the same. Fig. 4 isa transverse section of the same in a modified form. Fig. 5 is a transverse section of the disk heretofore in use.

Beferring to the drawings, A represents a drag bar or beam j ointed atits forward end to the frame B, which may be constructed and provided With supporting-wheels in the ordinary manner. In the present instance the drag-bar consists of two bars, a', converging toward their rear ends, where they are united and provided with faces O, having on their outer sides journals or axles D, which support the furrow-opening disks E. The general con structon and arrangement of these parts is substantially the same as in my pr'eceding patent ve referred to.

' quire.

tion ot' the disk in such manner as to form an l annular shoulder, b, at the junction of the two surfaces. The outer annular face, c, by which the furrow is formed, is made of a width of three inches, more or less, as occasion may re- I prefer to construct the disk with the outer portion, c, ofa flat form in an outer plane, as represented in Fig. 2, it being found in practice that a disk of this form adjusted in the proper position will give the best attainable results; but, if preferred, the portion c may be made ot' a curved or convex form in crosssection, as shown in Figo 4.

The essence of the invention consists in depressing the central portion of the face suddenly below the levelof the periphery of the operative portion. The result of this construction is that-when the disk is in action the earth, passing the shoulder b toward the center of the disk, is suddenly relieved from pressure or resistance, and that on again meeting the shoulder at theopposite side of the disk it is thrown outward with a curving or turning action in such manner that the earth is disintegrated and directed across the peripheral portion of the disk in a manner which effects a very thorough scouring action. Disks having the depressed center will run easily and cleanly in all soils.

The disks are preferably constructed of a single plate of steel forged or otherwise fashioned into shape. They will-be provided with the ordinary supporting-hab at the center, or otherwise supported, the only requirement being that there shall be a break in the continuity of their operative surfaces, as described.

Having thus described ny invention, what I claim isy 1. A furrow-opening disk having a central portion abruptly depressed below the plane of the periphery, as described and shown, to

form an abrnpt shoulder on the Working-face row-opening disk carried thereby in a position thereof. oblique to the line of travel, said disk having 2. A furrow-opening disk having an annuits working-face forned with a central depreslar face, c, of a true flat form, a central desion and am abrupt annular shoulder as dis- 15 5 pressed portion, and :n :brupt shoulder betinguished from a disk having a. smooth contween the fiat face and the central depressed cave surface. portion, substautially as described.

3. A furrow-opening disk having its outer XX ILLIAM ARNDTT' face provided with an abrupt annular shoulitnessesz IO der, b. P. J. CLEVINGER,

4. In combination with a drag-bar, a fur- GEO. \V. EMERY. 

